Numerical simulations on impact response behavior of RC beams mixed with PVA short-fibre under falling-weight impact loading

In this paper, in order to establish a simple impact response analysis method for the RC beams mixed with PolyVinyl Alcohol (PVA) short-fibre, the method replacing PVA short-fibre into some shell elements of PVA plates with an equivalent tensile strength to the post-peak residual tensile strength of the concrete was proposed. An applicability of the method was investigated conducting three-dimensional elasto-plastic finite element analysis using LS-DYNA code and comparing the results with the falling-weight impact test results for RC beams. From this study, it is confirmed that the crack distributions and failure mode of the RC beams mixed with PVA short-fibre can be better simulated, and upgrading effects of mixing PVA short-fibre on impact resistant capacity can be properly estimated by using the proposed numerical analysis method